Splunk Data Input Whitelist: Regex not matching

[beat_grob]

I am trying to add a directory input monitor to Splunk. In this directory I have many different CSV files. Since there are different types of CSV files in there, I'd like to create a data input for each CSV type.

The file I am trying to filter is named like this:
11046819.2017-07-07_23-26-33.messages.csv
11046868.2017-07-08_00-58-38.messages.csv

The files I am trying to avoid are named like this:
11046868.1.2017-07-08_15_23_01.transform_properties.cfg.csv
11046868.1.2017-07-08_15_23_01.print_properties.cfg.csv
11046868.1.2017-07-08_15_23_01.positional_attributes.csv
11046868.1.2017-07-08_15_23_01.policy_properties.cfg.csv

Currently there are 8753 files in the directory, of which only 1094 are relevant. My Splunk Data Input configuration looks like this:

After creating the input it shows me that it found 8753 files (amounting to the total number of files in that directory). However, it did not index any records, when I search for entries from that input type, no record is being displayed.

If I remove the whitelist regex all files are being indexed and I can see them in the log viewer. But that doesn't allow me to create different extraction strategies for the different CSV file types.

I have also tried using "*.messages.csv" and "*messages.csv", all of which produce the same outcome. What am I doing wrong?

[richgalloway · Accepted solution]

These two regex strings work on regex101.com with your sample file names.

.*\.messages\.csv

\d+\.\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}\.messages\.csv

[beat_grob]

Thanks for the response. I had tried that, but it didn't work. After creating and assigning a new index, it started to work.